Planar spiral inductors
Square, circular and polygon spirals with inductance, AC resistance and Q from the geometry.
PCB coils and NFC antennas, matched.
Planar spirals, NFC and RFID antennas, and trace parasitics, from the same solver.
What does the PCB Coils & Antennas do?
The PCB Coils & Antennas module designs planar spiral inductors on circuit boards and the matching networks that tune them. For NFC and RFID at 13.56 MHz it computes antenna inductance, resistance and Q, then sizes the matching capacitors for the reader IC. A PEEC (partial element equivalent circuit) bar solver extracts the inductance and resistance of arbitrary traces and loops, which also feeds the conducted-EMI and PDN modules.
Features
NFC and RFID matching
Antenna parameters at 13.56 MHz and the matching network for the reader.
PEEC trace extraction
Partial inductance and resistance of traces and loops on the board.
Qi and wireless charging coils
PCB coils for wireless charging, linked to the WPT tools.
Limits
Quasi-static extraction; antennas well beyond a fraction of a wavelength belong in the High-frequency & EMC module.
Every module ships with reference cases that run in our CI. See validation for how results are checked.
Related modules
PDN & Power Integrity
Power-integrity analysis in the browser: plane-pair cavity, decoupling capacitors and VRM, the PDN impedance Z(f) at the load against your target impedance, and a decap optimizer.
Conducted-EMI Predictor
Predict the conducted-emission spectrum of a switching converter through a LISN against CISPR 32, CISPR 25 or FCC Part 15.107 limits, with DM/CM split, peak, quasi-peak and average detectors, margin and a first filter.
High-frequency, EMC & Exposure
Wire-antenna and radiated-emission modelling against CISPR 32 limits, and RF field exposure against ICNIRP guidelines, in the browser.
Try the PCB Coils & Antennas.
Frequently asked questions
Can it design an NFC antenna matching network?
Yes. It computes the antenna inductance, resistance and Q at 13.56 MHz and sizes the matching capacitors.
Can it calculate PCB trace inductance?
Yes. The PEEC solver extracts partial inductance and resistance of traces and current loops.